
17.	Commitments and Contingencies

We lease office and warehouse facilities, vehicles and office equipment under operating lease agreements, which include both monthly and longer-term arrangements. Leases with initial terms of one year or more expire at various dates through 2028 and generally provide for extension options. Rent expense under the leasing agreements (exclusive of real estate taxes, insurance and other expenses payable under the leases) amounted to $23,348, $21,566 and $18,640 in 2018, 2017 and 2016, respectively.

The minimum rentals for aggregate lease commitments as of December 31, 2018 were as follows:



2019	$	15,200
2020	8,973
2021	5,535
2022	3,592
2023	2,636
Thereafter	4,215
Total	$	40,151

Certain operating leases for vehicles contain residual value guarantee provisions, which would become due at the expiration of the operating lease agreement if the fair value of the leased vehicles is less than the guaranteed residual value. The aggregate residual value at lease expiration of those leases is $14,043, of which we have guaranteed $8,404. As of December 31, 2018, we have recorded a liability for the estimated end-of-term loss related to this residual value guarantee of $243 for certain vehicles within our fleet. Our fleet also contains vehicles we estimate will settle at a gain. Gains on these vehicles will be recognized at the end of the lease term.

In the ordinary course of business, we may become liable with respect to pending and threatened litigation, tax, environmental and other matters. While the ultimate results of current claims, investigations and lawsuits involving us are unknown at this time, we do not expect that these matters will have a material adverse effect on our consolidated financial position or results of operations. Legal costs associated with such matters are expensed as incurred.

As of December 31, 2018, we hold a note receivable of $5,360, including accrued interest, on our Consolidated Balance Sheet. There is some uncertainty about the collectability of this note receivable; however, we are not able to determine an appropriate allowance, if any, as of December 31, 2018.